Caption: Barringer Crater. View of Barringer, or Meteor, Crater near Winslow in northeast Arizona, USA. Barringer Crater was named after the mining engineer who first suggested that it was formed by a meteorite impact. It is around 50,000 years old and is about 170 metres deep and 1200 metres across. Several attempts to mine the iron-rich material of the meteor were made before a visitor centre was built in the 1960's. Coesite and stishovite, two new silica minerals which are created at high temperatures and pressures, were first identified here. In recent years the crater has been used for astronaut training and studies in planet comparison.